Table 2.
Gender specific percentiles for skeletal muscle parameters for the total study population and for the subgroup aged 20–60 years
| SMA (cm2) | SMI (cm2/m2) | MRA (HU) | ||||
|---|---|---|---|---|---|---|
| Men | Women | Men | Women | Men | Women | |
| Aged 20–82 years | ||||||
| Mean ± SD | 173.6 ± 25.1 | 113.4 ± 15.2 | 52.8 ± 7.4 | 40.2 ± 5.2 | 38.4 ± 5.6 | 33.3 ± 6.8 |
| p5 | 134.0 | 89.2 | 41.6 | 32.0 | 29.3 | 22.0 |
| p10 | 141.6 | 93.0 | 44.7 | 32.8 | 31.7 | 24.9 |
| p25 | 154.2 | 102.8 | 47.7 | 36.4 | 34.9 | 28.5 |
| p50 | 171.4 | 112.5 | 52.0 | 40.0 | 38.4 | 33.3 |
| p75 | 190.1 | 124.0 | 58.0 | 43.3 | 42.3 | 38.8 |
| p90 | 208.6 | 132.0 | 63.3 | 46.9 | 45.5 | 41.7 |
| p95 | 216.9 | 138.9 | 67.1 | 48.9 | 48.0 | 43.6 |
| Aged 20–60 years | ||||||
| Mean ± SD | 179.3 ± 24.4 | 117.7 ± 14.4 | 53.9 ± 7.1 | 41.2 ± 5.0 | 39.6 ± 5.4 | 35.5 ± 6.0 |
| p5 | 138.2 | 96.2 | 43.1 | 32.7 | 30.9 | 24.8 |
| p10 | 146.3 | 99.8 | 45.9 | 34.5 | 32.8 | 27.7 |
| p25 | 163.6 | 107.6 | 48.4 | 37.9 | 35.8 | 31.2 |
| p50 | 178.9 | 117.9 | 53.2 | 40.9 | 39.4 | 36.2 |
| p75 | 196.9 | 127.0 | 58.8 | 44.1 | 43.3 | 40.6 |
| p90 | 212.2 | 135.4 | 64.8 | 47.7 | 46.4 | 42.8 |
| p95 | 219.3 | 142.3 | 67.4 | 49.6 | 48.1 | 44.6 |
Percentiles are based on a healthy population of 174 men and 246 women aged 20–82 years and 126 men and 174 women aged 20–60 years. p5 is considered as the cut-off between low and normal SMI, SMA, and MRA. SD standard deviation, SMI skeletal muscle index, SMA skeletal muscle area, MRA muscle radiation attenuation, HU hounsfield units